FSH is often used in conjunction with other tests (LH, testosterone, estradiol and progesterone)) in the workup of infertility in both men and women. FSH levels are used to help determine the reason a man has a low sperm count. FSH levels are also useful in the investigation of menstrual irregularities and to aid in the diagnosis of pituitary disorders or diseases involving the ovaries or testes. In children, FSH and LH are used to diagnose delayed or precocious (early) puberty.
FSH may be ordered to determine if a woman has reached menopuase.
